Nutella Cheesecake Cupcakes

Oreos (, finely crushed*)

salted butter (, melted)

granulated sugar

all-purpose flour

cream cheese (, well softened (use full fat))

large eggs

milk ((preferably whole or 2%))

sour cream

vanilla extract

Nutella

heavy cream

powdered sugar

chopped (, toasted hazelnuts)

chopped chocolate or real chocolate sprinkles (, for garnish)